QXM42-HS
8Pages

Catalog excerpts

Internal Gear Motor Series QXM42-HS • excellent suitability for high speeds • low hydromechanical losses • excellent cooling providing low operating temperatures, less stress to all moving parts and prevents premature aging of the hydraulic fluid • cost-savings in system design, assembly and maintenance • few moving parts and the hydrodynamic bearing effect ensure an exceptionnally long life • shaft accepts high radial loads • very low noise level 1.1 General The QXM42-HS (High Speed) Internal Gear Motor was developed specifically for use at extremely high speeds. Its high efficiency and extremely low noise levels also make a significant contribution to reducing the costs of both energy and anti noise measures. A double row angular ball bearing designed for high external loads and an integrated anti cavitation valve guarantee a long life. The integrated check valve prevents cavitation during unbraked spin out from maximal speed. Thanks to the special motor flange, adapted for such applications, and the integral ports for auxiliary functions, the motor can be used in many applications without needing any further modification. 1.2 External loads The QXM42-HS features a rugged integrated double-row ball bearing. Unlike the hydrodynamic bearings of the motors the ball bearing is subject to continuous wear. The lifetime of this bearing is determined by the following factors: • Magnitude of external shaft load (radial load) • Direction of external shaft load (axial load push or pull) • Motor speed • Viscosity of the fluid • Degree of contamination of the fluid Depending on the use of the QXM42-HS certain loads and working cycles occur. In order to establish the relevant bearing life it is necessary to know the load profile and the operating conditions of the motor. Please ask Bucher Hydraulics for your specific application. 1.3 Application examples • Saw drive motor in forestry harvesters • Saw drive motor in mobile sawmill • Fan drives in mobile machines

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100-P-000092-EN-09/04.2017 Internal Gear Motor QXM42-HS

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3.2 Displacement The operating data are valid for mineral oils with a viscosity of 42 mm2/s 1) for intermittent operation only (continuous speed please ask BUCHER HYDRAULICS) 2) at Ap= 200 bar / n= 5000 min-1 4 Performance graphs Values are valid for mineral oil HLP 46 at an oil temperature (reservoir) of 43°C 4.1 Starting torques 4.2 Maximum shaft seal pressure 100-P-000092-EN-09/04.2017 Internal Gear Motor QXM42-HS

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100-P-000092-EN-09/04.2017 Internal Gear Motor QXM42-HS

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100-P-000092-EN-09/04.2017 Internal Gear Motor QXM42-HS

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Series Internal Gear Motor High speed Sealing material Mounting flange Main ports Additional ports lubricating grease port 1/8” = F Anti cavitation valve Design code Options (inserted by the factory) 7 Operation instructions 7.1 Temperature and viscosity The temperature should not exceed 70 °C in the main circuit. At operating temperature, the viscosity of the hydraulic fluid should be above 15 mm2/s. At start-up, the viscosity should not exceed 1000 mm2/s. Up to the operating viscosity the motor must not be loaded. 7.2 Cold start The majority of hydraulic motor breakdowns are caused...

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QXM42-HS Motors require fluid with a minimum cleanliness level of NAS 1638, Class 9 or ISO 4406, code 20/18/15. We recommend the use of fluids that contain anti-wear additives for mixed-friction operating conditions. Fluids without appropriate additives can reduce the service life of pumps and motors. The user is responsible for maintaining, and regularly checking, the fluid quality. Bucher Hydraulics recommends a load capacity of > 30 N/mm2 to Brugger DIN 51347-2. 9 Fluid cleanliness class To guarantee the reliable operation and a long service life of the QXM42-HS Internal Gear Motors, a...

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